Free · in your browser · no install
Build a CPU from the transistor up
digiwleea is a switch-level logic lab and a from-the-ground-up course. Start with a single transistor, build it into gates, then adders, memory, and a working 8-bit CPU, with an AI tutor alongside you. Pick where to begin.
A live XOR gate. Open the lab and build your own →Tinker
Open the free sandbox. Drag transistors and gates, wire them up, flip a switch and watch the logic light up. No account needed.
Open the labTake the course
Learn by building. 30+ hands-on levels carry you from a single transistor all the way to a working CPU, checked step by step.
Start the courseRead the theory
The concepts, answer-first: gates, Boolean algebra, adders, memory, and CPUs, each with a playable diagram you can open in the lab.
Explore the lessonsOr just watch it work
Six quick, hands-on walkthroughs, from one transistor up to a running CPU. No account, no commitment: click and watch.